IMO if you're really concerned about anonymity and securing your email from credential-stuffing, and willing to pay for such a service (I used to pay for 33mail), it's easier to just buy a domain and route * to your inbox.
It won't get banned by some services, you have complete control over the domain and account, you can send email from any address you wish, you can sign up for domain-wide haveibeenpwned alerts by verifying domain ownership via TXT records, and you don't have to worry about the service going out of business in 2 years.
After going through my password manager last year and changing as many logins and emails as I could, I've found several services that have sold my email address to third parties and one that was hacked. It's a relief to know I don't have all my proverbial email eggs in one basket.
It won't get banned by some services, you have complete control over the domain and account, you can send email from any address you wish, you can sign up for domain-wide haveibeenpwned alerts by verifying domain ownership via TXT records, and you don't have to worry about the service going out of business in 2 years.
After going through my password manager last year and changing as many logins and emails as I could, I've found several services that have sold my email address to third parties and one that was hacked. It's a relief to know I don't have all my proverbial email eggs in one basket.